Hackers007's first kart

Images of my first Kart, Minix Tux. (for SamUncle and others)
Sorry for the zip. This is just the beginning, i am going to fix the shadow, add animations, add a better licence plate, change steering wheel, add exhaust, join tux's eyes and merge uv and textures etc.
One thing i don't understand is why i had to add a "Solidify" modifier to fix a problem were the closer faces of my kart were transparent (invisible) in stk ?
Also note i am new to 3D modeling, animation and texturing, this kart is the 3rd thing i have ever created in Blender
Sorry for the zip. This is just the beginning, i am going to fix the shadow, add animations, add a better licence plate, change steering wheel, add exhaust, join tux's eyes and merge uv and textures etc.
One thing i don't understand is why i had to add a "Solidify" modifier to fix a problem were the closer faces of my kart were transparent (invisible) in stk ?
Also note i am new to 3D modeling, animation and texturing, this kart is the 3rd thing i have ever created in Blender